So a cultural diversion from all the current shouting. Was it "Papa Haydn" or "Papa Bach"? And if the latter, which one, hint, probably not the more famous Johann Sebastian.
So Franz Josef Haydn (1732-1809) gets called that as he largely invented the modern form of the string quartet and the symphony (of which he composed 104), starting in the late 1750s as he held positions with various aristocratic families, following a youth in which he suffered extreme poverty and serious malnutrition. He also codified the sonata allegro form, which, would along with firmly establishing modern keys, would become the basis by the 1780s when he completed his musical form innovations the classical form of classical music, aided by his younger friend, W.A. Mozart (1756-1791), with whom he played string quartets in Vienna and who got him into the premier masonic lodge of the city. This standard of composition would be the form that later composers would rebel and modify and extend and finally completely overthrow over the next century and a half, starting with Haydn's student, Ludwig van Beethoven (1770-1827) and arguably culminating with the total serialism of Elliott Carter in the mid-20th century.
However, it turns out that Haydn was deeply influenced by a particular composer, one who actually invented the sonata allegro form in particular. That was Karl Philip Emmanuel Bach (1714-1788), whose manuscripts Haydn studied deeply during the 1760s as he developed his own style while working as Kappellmeister for the Estrhazy family from 1761 until his death, although he composed nothing after 1805 due to illness, the year Beethoven invented Romantic music with his Eroica Sympnyony No. 3, beginning the long deviation from Papa Haydn's standard. K.P.E. Bach was the oldest son of J.S. Bach (1685-1750) and was long at the Court of Frederick the Great in Berlin, until moving in 1764 to Hamburg to replace his late godfather, Philip Telemann in a position there.
In his lifetime KPE Bach was far more well known and renowned than his father. Both Haydn and Mozart were crucially influenced by him. It was Mozart who recognized this by calling him "Papa Bach." However, in the 19th century, Mendelsohn would revive interest in his father, who is now much better known.